dom/midi/MIDIMessageEvent.cpp
author Noemi Erli <nerli@mozilla.com>
Thu, 24 May 2018 18:30:36 +0300
changeset 476428 fae06a27c30119754a4522f9ec21d254d34cfc80
parent 460149 63de8ef246cc1d306ae4825ba3eda458def0572f
child 481599 a97feb8161b7a4c60a539d83cb702a6e50fab1b1
permissions -rw-r--r--
Backed out changeset c19f0dedfb15 (bug 1463794) for reftest failures in build/tests/reftest/tests/layout/reftests/w3c-css/submitted/shapes1/shape-outside-circle-056.html on a CLOSED TREE

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "mozilla/dom/EventBinding.h"
#include "mozilla/dom/MIDIMessageEvent.h"
#include "mozilla/dom/MIDIMessageEventBinding.h"
#include "js/GCAPI.h"
#include "jsfriendapi.h"
#include "mozilla/FloatingPoint.h"
#include "mozilla/dom/Nullable.h"
#include "mozilla/dom/PrimitiveConversions.h"
#include "mozilla/dom/TypedArray.h"
#include "mozilla/dom/Performance.h"

namespace mozilla {
namespace dom {


NS_IMPL_CYCLE_COLLECTION_CLASS(MIDIMessageEvent)

NS_IMPL_ADDREF_INHERITED(MIDIMessageEvent, Event)
NS_IMPL_RELEASE_INHERITED(MIDIMessageEvent, Event)

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(MIDIMessageEvent, Event)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(MIDIMessageEvent, Event)
  NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mData)
NS_IMPL_CYCLE_COLLECTION_TRACE_END

NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(MIDIMessageEvent, Event)
  tmp->mData = nullptr;
NS_IMPL_CYCLE_COLLECTION_UNLINK_END

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MIDIMessageEvent)
NS_INTERFACE_MAP_END_INHERITING(Event)

MIDIMessageEvent::MIDIMessageEvent(mozilla::dom::EventTarget* aOwner)
  : Event(aOwner, nullptr, nullptr)
{
  mozilla::HoldJSObjects(this);
}

MIDIMessageEvent::~MIDIMessageEvent()
{
  mData = nullptr;
  mozilla::DropJSObjects(this);
}

JSObject*
MIDIMessageEvent::WrapObjectInternal(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
  return MIDIMessageEventBinding::Wrap(aCx, this, aGivenProto);
}

MIDIMessageEvent*
MIDIMessageEvent::AsMIDIMessageEvent()
{
  return this;
}

already_AddRefed<MIDIMessageEvent>
MIDIMessageEvent::Constructor(EventTarget* aOwner,
                              const class TimeStamp& aReceivedTime,
                              const nsTArray<uint8_t>& aData)
{
  MOZ_ASSERT(aOwner);
  RefPtr<MIDIMessageEvent> e = new MIDIMessageEvent(aOwner);
  e->InitEvent(NS_LITERAL_STRING("midimessage"), false, false);
  e->mEvent->mTimeStamp = aReceivedTime;
  e->mRawData = aData;
  e->SetTrusted(true);
  return e.forget();
}

already_AddRefed<MIDIMessageEvent>
MIDIMessageEvent::Constructor(const GlobalObject& aGlobal,
                              const nsAString& aType,
                              const MIDIMessageEventInit& aEventInitDict,
                              ErrorResult& aRv)
{
  nsCOMPtr<EventTarget> owner = do_QueryInterface(aGlobal.GetAsSupports());
  RefPtr<MIDIMessageEvent> e = new MIDIMessageEvent(owner);
  bool trusted = e->Init(owner);
  e->InitEvent(aType, aEventInitDict.mBubbles, aEventInitDict.mCancelable);
  // Set data for event. Timestamp will always be set to Now() (default for
  // event) using this constructor.
  const auto& a = aEventInitDict.mData.Value();
  a.ComputeLengthAndData();
  e->mData = Uint8Array::Create(aGlobal.Context(), owner, a.Length(), a.Data());
  if (NS_WARN_IF(!e->mData)) {
    aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
    return nullptr;
  }

  e->SetTrusted(trusted);
  mozilla::HoldJSObjects(e.get());
  return e.forget();
}

void
MIDIMessageEvent::GetData(JSContext* cx,
                          JS::MutableHandle<JSObject*> aData,
                          ErrorResult& aRv)
{
  if (!mData) {
    mData = Uint8Array::Create(cx,
                               this,
                               mRawData.Length(),
                               mRawData.Elements());
    if (!mData) {
      aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
      return;
    }
    mRawData.Clear();
    JS::ExposeObjectToActiveJS(mData);
  }
  aData.set(mData);
}


} // namespace dom
} // namespace mozilla